CN219740678U

CN219740678U - Lighting system based on OFDM power carrier technology

Info

Publication number: CN219740678U
Application number: CN202321045400.5U
Authority: CN
Inventors: 张晨曦; 薛晓峰; 吴祥国; 刘文武; 王仪杭; 吴可; 许礼意
Original assignee: Huaneng Luoyuan Power Generation Co Ltd
Current assignee: Huaneng Luoyuan Power Generation Co Ltd
Priority date: 2023-05-04
Filing date: 2023-05-04
Publication date: 2023-09-22
Anticipated expiration: 2033-05-04

Abstract

The utility model relates to an illumination system based on an OFDM power carrier technology, which comprises a PC client and a remote monitoring module, wherein the PC client and the remote monitoring module are both connected with a centralized controller, the centralized controller comprises a control element, a dimming module and a conversion module, the centralized controller is connected with the dimming module through the OFDM power carrier technology, the control element is respectively connected with a remote controller, an inductor and a touch screen, the dimming module is connected with an LED lamp, and the conversion module is connected with a camera, a fire alarm module and an anti-theft module; the utility model has simple structure, convenient operation, realizes that most of sub-carriers are not affected, can ensure normal reception, and is suitable for the environment with more interference and complexity in a power plant.

Description

Lighting system based on OFDM power carrier technology

Technical Field

The utility model relates to a lighting system based on an OFDM power carrier technology, which is applied to the technical field of energy conservation of power lighting equipment.

Background

As known, since 1996, green lighting engineering has been put into the key energy-saving field planned by five years in the country, but at present, conventional power plant lighting generally adopts the first three generations or adopts the fourth generation (LED) lighting lamp partially, and cannot completely respond to the national energy-saving lamp requirement, and the technology is limited to save energy only by manually switching on and off, so the following problems exist in the field at present: (1) the conventional illuminating lamps of the power plant generally adopt metal halide lamps, high-pressure sodium lamps, fluorescent lamps, incandescent lamps and the like, and the traditional light source consumes large energy, or adopts energy-saving lamps partially, and does not adopt energy-saving lamps completely; (2) the high-pressure sodium lamp, the high-pressure mercury lamp and the metal halogen lamp can only be started in a cold state, and if the lamp is started after being turned off, the lamp can be turned on only after a plurality of minutes of unequal time delays are needed; (3) some working areas can realize partial lamps in a wiring mode to achieve the energy-saving effect, but manual intervention is needed, uneven field illumination is caused, and meanwhile, the adjustment capability is limited; (4) the traditional illumination can only be manually controlled on site, cannot be remotely controlled, is inconvenient to operate, cannot switch on and off the lamp in time according to actual conditions, and often causes the illumination failure and the switching failure due to manual operation; (5) the management means is single, the running condition of the illumination equipment in the factory can not be monitored accurately and comprehensively in real time, the lamp faults can only be found by adopting a manual inspection means, statistics is difficult, real-time monitoring can not be realized, and the fault response is slow; (6) because equipment in a power plant is concentrated, various cables in a cable bridge and a cable trench are many, interference sources are many and interference is large, single or several frequency bands are easy to be interfered on site, communication is interrupted due to interference, a control instruction cannot be transmitted to a controlled lamp, and the lamp is not controlled, and is not bright, not extinguished or not consistent in brightness; (7) some landscape lighting communication usually adopts 485, DALI and other bus modes, and a two-core communication wire needs to be laid between the controller and the lamp, so that the cable investment, construction and debugging difficulty are increased, meanwhile, the general communication wire is thinner than the power wire diameter, and the fault rate is increased; there are also power carrier modes, in which a single frequency or frequency hopping (automatic hopping to another frequency band when communication in a preset frequency band is not smooth) carrier is adopted, but the single frequency carrier mode cannot adapt to communication in a power plant with complex and strong interference.

The power plant is a continuous production enterprise, the lighting load has larger electricity consumption, the environment-friendly light source and the energy-saving lighting scheme are selected to play a very important role in reducing the power consumption of the plant and reducing the environmental pollution, and the price of the power coal used by the thermal power generation enterprise is continuously high, so that the energy conservation and consumption reduction become urgent demands of the power plant.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a lighting system based on an OFDM power carrier technology, which can realize that most subcarriers are not affected, can ensure normal reception and is suitable for a complex environment with more interference in a power plant.

The technical scheme of the utility model is as follows:

the utility model provides a lighting system based on OFDM power line carrier technology, includes PC customer end and remote monitoring module, PC customer end and remote monitoring module all are connected with centralized controller, centralized controller includes control element, module and the conversion module of adjusting luminance, centralized controller passes through OFDM power line carrier technology and is connected with the module of adjusting luminance, be connected with remote controller, inductor and touch-sensitive screen on the control element respectively, be connected with the LED lamps and lanterns on the module of adjusting luminance, be connected with camera, fire alarm module and anti-theft module on the conversion module.

The PC client is connected with the centralized controller through a network cable or an optical fiber.

The dimming module is in wireless connection with the LED lamp.

The LED lamps are connected in parallel.

The camera, the fire alarm module and the anti-theft module are respectively connected with the conversion module in a wireless mode.

The camera, the fire alarm module and the anti-theft module are connected in parallel.

The utility model has the following beneficial effects:

1. compared with a bus mode, the lower communication (communication among the centralized controller, the lamp, the inductor and other epitaxial equipment) does not need to lay network wires, so that the problems of debugging difficulty and easy network wire faults are solved.

2. Compared with the single frequency and the frequency hopping carrier communication, the OFDM carrier communication has only 1 frequency, and the same signal is transmitted in a broadcast mode on a plurality of subcarrier frequencies at the same time, only a small part of subcarriers are affected, and most of subcarriers are not affected, so that normal receiving can be ensured, and the method is suitable for the environment with more interference and complexity in a power plant.

3. The OFDM carrier communication point-to-point transmission distance is long and reaches 2000 meters, and the single frequency is only about 100 meters; the transmission rate is high and stable, the rate reaches 108MBps, and the single frequency is 5.75KBps; the internal communication network adopts a peer-to-peer network, any node can be used as a relay, the distance is infinitely prolonged, the method is particularly suitable for a large number of lighting nodes in a power plant, and the problem of communication blockage caused by the fact that a master node sends out an instruction when a master-slave network has a large number of network nodes is solved.

Drawings

FIG. 1 is a schematic diagram of a system architecture of the present utility model;

the reference numerals in the drawings are as follows:

1. a PC client; 2. a remote monitoring module; 3. a centralized controller; 4. a control element; 5. a dimming module; 6. a conversion module; 7. a remote controller; 8. an inductor; 9. a touch screen; 10. an LED lamp; 11. a camera; 12. a fire alarm module; 13. an anti-theft module.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

Referring to fig. 1, the lighting system based on the OFDM power carrier technology comprises a PC client 1 and a remote monitoring module 2, the PC client 1 and the remote monitoring module 2 are both connected with a centralized controller 3, the centralized controller 3 comprises a control element 4, a dimming module 5 and a conversion module 6, the centralized controller 3 is connected with the dimming module 5 through the OFDM power carrier technology, the control element 4 is respectively connected with a remote controller 7, an inductor 8 and a touch screen 9, the dimming module 5 is connected with an LED lamp 10, and the conversion module 6 is connected with a camera 11, a fire alarm module 12 and an anti-theft module 13.

The PC client 1 is connected with the centralized controller 3 through a network cable or an optical fiber.

The dimming module 5 is in wireless connection with the LED lamp 10.

The LED lamps 10 are in a plurality, and the LED lamps 10 are connected in parallel.

The camera 11, the fire alarm module 12 and the anti-theft module 13 are respectively connected with the conversion module 6 in a wireless mode.

The camera 11, the fire alarm module 12 and the anti-theft module 13 are connected in parallel.

The working principle of the utility model is as follows:

when the intelligent control system is used, according to the two conditions of starting and stopping of the generator set and lighting requirements of each area, the scene mode is preset, different lighting of each area of the power plant is met, and the scene mode determined by intelligent control is used for realizing the switching on/off and brightness adaptability adjustment of the lighting lamp so as to reduce the labor intensity of operating on duty and overhauling maintenance personnel and realize energy conservation and consumption reduction. The basic categories of contextual models are as follows:

contextual model 1: the power output is preset according to a schedule under the normal condition of daytime power failure and nighttime (1. Unmanned low power output; 2. Inspection brightness output). The device is used for the running layer of the steam turbine room, the ceiling of the steam turbine room is good in lighting in daytime, and the lamp is turned off in daytime; the night is the night inspection power mode (50%); and a last night no-go low power mode (15%).

Contextual model 2: the night is normal, and the night is unmanned low-power output. But also can directly select the required brightness by human intervention (1. Unmanned low power output; 2. Inspection brightness output; 3. Inspection brightness enhancement output). The method is used for 0m layers, middle layers, side coal bin 0m boiler coal mill areas and the like of the turbine room.

Contextual model 3: the lamp is turned off according to the longitude and latitude schedule in the daytime, and the normal condition at night is unmanned low-power output. But also can directly select the required brightness by human intervention (1. Unmanned low power output; 2. Inspection brightness output; 3. Inspection brightness enhancement output). The method is used for a 0 m-layer manhole area, a door and window vicinity, a boiler operation layer, a transformer area and the like of a steam turbine room.

Contextual model 4: the system is also called a unit starting-up mode, lights are turned off according to a longitude and latitude time table in the daytime, and the night is a patrol power mode (50 percent) before night; the later night has no low power mode (15%), but the maintenance and brightening can be directly selected by human intervention. The method is suitable for being used on the boiler running layer, denitration and air preheater platforms, the back of the boiler (the position of a primary fan, etc.), and the like.

Contextual model 5: the system is also called a machine set shutdown mode, lights are turned off according to a longitude and latitude time table in the daytime, and shutdown power output is 15% in the middle of night; the ultra-low power output (10%) is not available in the latter half of the night, but the maintenance and brightening can be directly selected by human intervention. The method is suitable for being used on the boiler running layer, denitration and air preheater platforms, the back of the boiler (the position of a primary fan, etc.), and the like.

Contextual model 6: the outdoor area is turned off in daytime and the lamp is turned on at night; the constant power can be used for indoor inspection or maintenance and brightening of personnel through manual control by longitude and latitude time control or light control. The device is used for induced draft fan areas, electric dust removal areas, circulating water areas and the like.

Contextual model 7: walkways, stairs modes. Human body sensors are arranged on the floors of each stair, corresponding floors (provided with light-adjustable LED lamps) are sequentially lightened according to the walking time of people, and the low-power brightness is recovered after the people leave the floors.

Contextual model 8: the power distribution room mode only keeps one lamp at each gate to be lightened through human body induction (not lightened in daytime and time control of longitude and latitude). When someone enters, the other lamps are manually controlled to light up. The power distribution room is used for a factory distribution room.

Contextual model 9: in the street lamp mode, the lamp is started and stopped according to a longitude and latitude time table in the daytime. Night illumination is carried out at different power outputs in a time period, and a normal power mode (100%) is carried out before 22 points; 22-2 o' clock half power mode the next morning (40%); 2:00-4:00 output 80% brightness; 4: and 20% of power output after 00 is used for common street lamps.

The above percentages represent the percentage values of the output power in relation to the rated power.

The intelligent illumination scene mode control method comprises the steps of directly controlling the power switch of an illumination loop by adding longitude and latitude time control to the above boiler operation layer, the street lamp and the desulfurization absorption tower, setting power failure in the daytime, switching on at night, and lighting according to a set scene mode time table. Under the dual control, even if the intelligent control system is abnormal due to communication failure or other reasons, the lamp can still be ensured not to be wrongly lighted in the daytime.

The main idea of OFDM power carrier technology is to divide a given channel into many orthogonal sub-channels in the frequency domain, modulate each sub-channel with one subcarrier, and transmit the subcarriers in parallel. The specific brightness in the use process can be properly adjusted according to the actual use effect.

The utility model realizes the control of single-lamp brightness in main plants, boiler rooms, whole-plant street lamps and the like, and the controlled power of each lamp is 0-100% of stepless dimming output; different scene modes are set through different time schedules, and different areas are corresponding to the different scene modes, or the same area needs to be illuminated in the on-off state of the unit, when the setting is completed, the lamp automatically operates according to the preset time schedule, different illumination is provided at different time periods, so that the illumination needs are met, the energy is saved, manual intervention is not needed, the degree of automation is high, the illumination uniformity effect is good, and the labor intensity of operators on duty is greatly reduced. The intelligent control system has the functions of lamp fault detection, metering, time sequence control, longitude and latitude control, temperature fault alarm and the like besides controlling the on/off of an accessed illuminating lamp and adjusting output power. The fault detection can be used for helping system maintenance personnel to find out the cause of the problem of the system and the fault lamp, so that the maintenance personnel can conveniently and timely handle the problem without finding out that the lamp is not bright and then processing the problem, and the workload of the maintenance personnel is greatly reduced.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. An illumination system based on an OFDM power carrier technology is characterized in that: including PC customer end (1) and remote monitoring module (2), PC customer end (1) and remote monitoring module (2) all are connected with centralized controller (3), centralized controller (3) are including control element (4), module (5) and conversion module (6) adjust luminance, centralized controller (3) are connected with module (5) through OFDM power line carrier technique, be connected with remote controller (7), inductor (8) and touch-sensitive screen (9) on control element (4) respectively, be connected with LED lamps and lanterns (10) on module (5) adjust luminance, be connected with camera (11), fire alarm module (12) and antitheft module (13) on conversion module (6).

2. The lighting system based on the OFDM power carrier technology as claimed in claim 1, wherein: the PC client (1) is connected with the centralized controller (3) through a network cable or an optical fiber.

3. The lighting system based on the OFDM power carrier technology as claimed in claim 1, wherein: the dimming module (5) is in wireless connection with the LED lamp (10).

4. A lighting system based on OFDM power carrier technology as claimed in claim 3, wherein: the LED lamps (10) are connected in parallel.

5. The lighting system based on the OFDM power carrier technology as claimed in claim 1, wherein: the camera (11), the fire alarm module (12) and the anti-theft module (13) are respectively connected with the conversion module (6) in a wireless mode.

6. The lighting system based on the OFDM power carrier technology as set forth in claim 5, wherein: the camera (11), the fire alarm module (12) and the anti-theft module (13) are connected in parallel.